DESC:FIELD OF INVENTION
The present invention relates to the field of pressure cookers, more specifically to a method to detect the Pressure cooker whistles and indicate visually to the user.

BACKGROUND OF THE INVENTION
In Pressure Cooker, the Pressure regulator also known as Weight which indicates the Pressure Build up action to the User through a hissing sound called whistles. In countries like India, people generally use the Number of whistles (i.e., Number of times Pressure has been built up to the full capacity and released automatically) as an indicator of time period to cook their food in the Pressure Cooker.
The cooker whistle is placed on top of the vent tube of the pressure cooker. It is made of special heat-resistant bake-lite material and stainless steel. When the pressure built up inside the heated pressure cooker is high, and no other way of escape for the pressure(i.e., no faulty vent/lid/gasket/closure), the pressurized air lifts the whistle and escapes through the vents in the whistle, creating the eponymous sound.
The time duration of cooking, the number of whistles, amount of food contained in the whistle all play a very important role in the cooking of the food.
But it is easy to mistake the number of whistle counts, due to which their food cannot be cooked properly (Over cooked / Under cooked) in the hustle of daily activities. Hence, it is important to come up with innovative solutions that monitor the number of whistles for stove top pressure cookers.
There are a few patented inventions which address this issue which have been discussed below:
The patent CN109008598B relates to a pressure alarm device for the electric pressure cooker that displays the temperature and timing information of the cooker. It consists of a special whistle with an electromagnetic valve and several vents for pressure release. The device is designed with the circuit board that can automatically control the electromagnetic valve and the heat dissipation fan to be turned on, the alarm indicator lamp is electrified to emit light, hot steam in the electric pressure cooker is exhausted from the exhaust pipe after passing through the cooling box and the electromagnetic valve , when hot steam passes through the wind whistle, the internal vibration of the wind whistle is triggered to give an alarm, when the hot steam passes through the square-shaped channel, the heat in the hot steam is transmitted to the outside of the cooling box through the conduction of the metal heat-conducting shell.
The patent application 201621005754 titled “Digital Whistle Alert System For Pressure Cookers” relates to a portable battery-operated device for counting whistles of a pressure cooker. It consists of a controller unit for controlling the signals from the input unit, counter unit and buzzer and programmed to set the value from the input unit, and count the pressure whistle release in pressure cooker means if value of the pressure whistle release and value provided from the input unit is same then the buzzer is beeping, Counter Unit for counting pressure whistle release from the pressure chamber, switch which gives input to the controller unit and controller count input from input unit, Buzzer which beeps if counter value and input unit values are same, five volt rechargeable battery, switch designed to cut the power supply from the battery, LED light connected to switch, transducer to charge the battery, and providing supply to LED light.
The patent CN201668278U (Timing alarm device of pressure cooker) relates to a pressure cooker timing alarm apparatus, it is characterized in that: comprise housing, timing control apparatus and pneumatic warning sound-producing device, described pneumatic warning sound-producing device comprises the bleeder pipe that is arranged on adapted pot body, this bleeder pipe top is provided with a timing lever, this timing lever lower end is tapered, and can block the mouth of pipe of bleeder pipe, timing control apparatus can press down or discharge timing lever.
The problems with these inventions lie on the following factors: Accuracy, cost, whistle detection & communication to the end users. Other prior art inventions have employed a few sensors, which lack in accuracy, as the sensors are not mounted directly to the Pressure regulator. These issues have been addressed in our present invention.

OBJECTIVE OF THE INVENTION
The main objective of our present invention is to provide a whistle sensor directly fitted in such a way which directly manipulates the movement of the pressure regulator so that the exact whistle count of the cooker is communicated to the user using display.
Another objective of our present invention is to utilize the “Hall effect Sensor” to provide accurate output in terms of the number of whistles.
Another objective of our present invention is to indicate the end of cooking once the number of Whistles/Preset time which was already set by the user has reached.

SUMMARY OF THE INVENTION
The following summary is provided to facilitate a clear understanding of the new features in the disclosed embodiment and it is not intended to be a full, detailed description. A detailed description of all the aspects of the disclosed invention can be understood by reviewing the full specification, the drawing and the claims and the abstract, as a whole.
The present invention relates to a pressure cooker designed with a special type of lid that can count the number of whistles accurately. It comprises of the following subassemblies: Lid, Body, Pressure Regulator & Handle Assemblies. Both the Lid & Body can be made of Stainless steel / Aluminium. The pressure cooker assembly consists of the following: Pressure regulator, Hall-effect sensor, Magnet, Lid with Gasket, Display unit with buttons PCB Board, Battery, Buzzer.
In one aspect of the current invention, whistle count sensing operation comprises of 2 modes: whistle mode and Timer mode. Initially the User will set the number of whistles or cooking time required for his food to get cooked using buttons & Display provided in the handle. In general, Pressure regulator makes hissing sound whenever the Pressure has built up inside the cooker.
In our invention, we used this as an opportunity and utilized this pressure built up action as a triggering point to measure the Number of whistles. The Magnet attached to the Pressure regulator, which moves up & down simultaneously but indirectly proportional along with the Pressure regulator. The Hall sensor used here can sense the magnetic field presence. the assembly fitment is in such a way that the sensor captures the movement of the magnet attached to the Pressure regulator. Hence whenever the Pressure regulator moves up to release the pressure the magnet moves down and the sensor gets ON signal, and immediately after the release the Pressure regulator moves down, and the magnet moves up through which the Sensor gets OFF signal.
Using this Continuous observation of ON / OFF signal, the processor fixed in the PCB manipulates and convert the signal to whistle counts. Once the Preset whistle value set by the user reaches, the Processor automatically triggers the Buzzer Indication, which tells the user that his food has cooked, and all the whistles are done. Same operations applicable for the Timer mode, i.e. after the first movement of the pressure regulator timer gets ON, example 10 min and the countdown start, once the timer runs out, it indicates through the buzzer.

BRIEF DESCRIPTION OF THE DRAWINGS
The manner in which the present invention is formulated is given a more particular description below, briefly summarized above, may be had by reference to the components, some of which is illustrated in the appended drawing It is to be noted; however, that the appended drawing illustrates only typical embodiments of this invention and are therefore should not be considered limiting of its scope, for the system may admit to other equally effective embodiments.
Throughout the drawings, the same drawing reference numerals will be understood to refer to the same elements and features.
The features and advantages of the present invention will become more apparent from the following detailed description a long with the accompanying figures, which forms a part of this application and in which:
Figure 1: Diagram illustrating the overall pressure cooker assembly wherein: Fig 1A (Front), 1B (Side), and 1C (Top) views, in accordance with one embodiment of our present invention;
Figure 2: Diagram illustrating the exploded view showing key pressure cooker sub-assemblies, in accordance with one embodiment of our present invention;
Figure 3: Diagram illustrating the Sectional view showing the gasket in lid and the battery placement in the lid assembly, in accordance with one embodiment of our present invention;
Figure 4: Diagram illustrating the Sectional view detailing internal components and sensor integration, in accordance with one embodiment of our present invention;
Figure 5: Diagram illustrating a plastic mock-up of the pressure cooker model. Demonstrates form, design aesthetics, and component fit, in accordance with one embodiment of our present invention;
Figure 6: Diagram illustrating the Working proof of concept showing actual prototype in use; Demonstrates real-world functionality and performance, in accordance with one embodiment of our present invention;
Figure 7: Diagram illustrating the step-by-step assembly sequence of the cooker; Covers integration of electronic and mechanical parts, in accordance with one embodiment of our present invention;
Figure 8: Diagram illustrating the testing data for safety and performance verification; Includes images 8A–8E (Air, Pressure, Gasket, Sensor, cooking tests, setting whistles/timer with buttons), in accordance with one embodiment of our present invention;
Figure 9: Diagram illustrating the cooker functionality without electronic components. Shows manual mode for safety and usability assurance, in accordance with one embodiment of our present invention;
Figure 10: Diagram illustrating the information shown on the mobile app for the cooker’s screen, showing the status indicators, mode display, and operational alerts and the mobile app integration using Bluetooth connectivity; Includes Fig 10A (Whistle Mode) and Fig 10B (Timer Mode), in accordance with one embodiment of our present invention;

REFERENCE NUMERALS
200 - Pressure Regulator Assembly
201 - Handle Assembly
202 - Lid Subcomponents
203 - Body assembly
300 – Lid with Gasket
301– Batteries
400 – Buzzer
401 –display unit
402 –PCB (printed circuit board)
403 –Hall sensor
404 –Magnet
405 –pressure regulator

DETAILED DESCRIPTION OF THE INVENTION
The principles of operation, design configurations and evaluation values in these non-limiting examples can be varied and are merely cited to illustrate at least one embodiment of the invention, without limiting the scope thereof.
The embodiments disclosed herein can be expressed in different forms and should not be considered as limited to the listed embodiments in the disclosed invention. The various embodiments outlined in the subsequent sections are constructed such that it provides a complete and a thorough understanding of the disclosed invention, by clearly describing the scope of the invention, for those skilled in the art.
Throughout this specification various indications have been given as to preferred and alternative embodiments of the invention. It should be understood that it is the appended claims, including all equivalents, which are intended to define the spirit and scope of this invention.
The current embodiment of the present invention relates to a Pressure cooker which comprises of the following subassemblies: Lid (202), Body (203), Pressure Regulator (200) & Handle (201) Assemblies as shown in Fig 2. Both the Lid (202) and Body (203) can be made of Stainless steel / Aluminium. The body (203) is like the typical Pressure cooker bodies available in the market. Considering the safety aspects, we have maintained all the safety components same as the current products in the market. The Core invention lies in our Handle (201) of the Pressure Cooker. We have incorporated all the components inside the Handle of the Lid. Overall Pressure cooker is as shown in Fig 1.
One embodiment of our present invention comprises of the following components as shown in Fig 3 and Fig: 4:
(a) Pressure regulator (405): It Controls and maintains pressure inside the cooker and indicates when the ideal cooking pressure - usually 15 psi - is reached.
(b) Hall-effect sensor (403): These are integrated circuits that transduce magnetic fields to electrical signals with accuracy, consistency, and reliability.
(c) Magnet (404): Neodymium magnets are also commonly used in magnetic separators, filters, ionizers, in production of on–off buttons, safety sector and security systems.
(d) Lid with Gasket (300): Lid has been made of Stainless steel and bottom is fitted with silicon gasket to hold the pressure.
(e) Display unit with buttons (401): Segmented LCD Customized display which indicates the No of whistle counts & Cooking Time & buttons are used to set the number of whistles required / to set the cooking time.
(f) PCB Board (402): Circuit to control and interpret the number of whistles from hall sensor and communicates to the Display unit.
(g) Battery (301): 2 Replaceable AAA batteries with the average life of 2 months.
(h) Buzzer (400): We used buzzer which can produce the sound up to 100 decibels
In the current invention, whistle count sensing operation comprises of 2 modes: whistle mode and Timer mode. Initially the User will set the No of whistles or cooking time required for his food to get cooked using buttons & Display (401) provided in the handle. In General, Pressure regulator (405) makes hissing sound whenever the Pressure has built up inside the cooker.
In our present invention, we used this as an opportunity and utilized this pressure built up action as a triggering point to measure the Number of whistles. The Magnet (204) attached to the Pressure regulator (405), which moves up & down simultaneously but indirectly proportional along with the Pressure regulator (405). The Hall sensor (403) we used here can sense the magnetic field presence. The assembly fitment is designed in a way that the sensor captures the movement of the magnet attached to the Pressure regulator. Hence whenever the Pressure regulator (405) moves up to release the pressure the magnet moves down and the sensor(403) gets ON signal, and immediately after the release the Pressure regulator (405) moves down, and the magnet (404) moves up through which the Sensor(403) gets OFF signal.
Using this Continuous observation of ON / OFF signal, the processor (403) fixed in the PCB (403) manipulates and convert the signal to whistle counts. Once the Preset whistle value set by the user reaches, the Processor automatically triggers the (400) Buzzer Indication, which tells the user that his food has cooked, and all the whistles are done. Same operations applicable for the Timer mode, i.e. after the first movement of the pressure regulator timer gets ON, example 10 min and the countdown starts, once the timer runs out, it indicates through the buzzer (400).
The components mentioned above are fitted inside the handle portion, we have designed the product in a way that, the handle portion is completely waterproof & dust proof and also completely detachable for the cleaning purposes (as shown in fig 8(A)-8(E)). After the Handle unit is detached separately, the dirt can be wiped off and remaining parts of the cooker can be cleaned as normal operation.
All these Electronic operations are run with the Help of 2 AAA batteries (301) as seen in Fig 3, which has an average life of 2 months. The complete Handle assembly is hermetically sealed and completely waterproof.
Without affecting any performance of the Pressure cooker, the current innovation achieves the Whistle count Indication to the User. In addition to the mandatory safety features, the current innovation also adds the safety to one level up through enabling the user to switch of the cooker at proper time.
The Entire Assembly is easily serviceable for replacement of spare parts and the User modes provided in the current innovation, helps both Indian cooking users where they follow whistle count method and the western world as they follow the timer mode in pressure cooking. Moreover, our present invention enhances the user cooking experience by switching over between Timer Mode and Whistle Count mode which is shown in Figure 10.
The present invention pertains to a smart stove-top pressure cooker designed to enhance cooking accuracy and convenience through a whistle counting and timer-based system. Traditional Indian cooking methods rely heavily on counting the number of pressure "whistles" to determine food doneness. However, users often miss or miscount these whistles, leading to undercooked or overcooked food. The invention introduces a cost-effective, sensor-integrated pressure cooker that accurately detects and counts these whistles using a Hall-effect sensor and magnet assembly, with real-time feedback through an integrated display and optional Bluetooth-based mobile app notification system.
The overall appearance and construction of the pressure cooker are shown in Figure 1 (Figures 1A, 1B, and 1C). These figures illustrate the cooker from angled, side, and top perspectives, respectively, highlighting the placement of the handle, regulator, and lid structure. The design adheres to familiar stove-top models to ensure comfort and familiarity for users.
To better understand the construction, an exploded view of the cooker’s main assemblies is presented in Figure 2, breaking the cooker into its four primary sub-assemblies: the Pressure Regulator Assembly (200), the Handle Assembly (201) the Lid Subcomponents (202), and the Body Assembly (203). These illustrations show how each part connects and houses internal components. The handle assembly (201) is the core of the invention, where all the electronics are embedded. It is designed to be waterproof, dustproof, and detachable, allowing for easy cleaning and maintenance without exposing sensitive components.
The sectional view shown in Figure 3 provides a comprehensive illustration of the internal component integration. The pressure regulator (200) functions as a mechanical valve that controls pressure inside the cooker. Affixed to its base is a magnet (404), which moves up and down as pressure builds and is released. A Hall-effect sensor (403), housed inside the handle, detects the movement of the magnetic field created by the regulator’s motion. These ON/OFF changes are captured and sent to the PCB (Printed Circuit Board) (402) shown in Fig. 4, which interprets them into accurate whistle counts.
The display unit (401) is a custom segmented LCD embedded in the handle. It shows real-time whistle counts or a countdown timer depending on the selected mode. Buttons adjacent to the display allow the user to set either the desired number of whistles or a cooking duration. The system is powered by two AAA batteries (301), which offer approximately two months of usage under typical conditions. To enable mobile app integration, a Bluetooth module is incorporated into the handle, allowing the whistle count or timer progress to be sent to a smartphone. This feature enhances remote usability and user notifications.
A lid with a silicone gasket (300) ensures airtight sealing during cooking, maintaining safe pressure buildup. All electronic components are securely housed within the handle, ensuring that the invention does not interfere with standard cooking functions or safety mechanisms. The whistle-counting logic uses the magnet-Hall sensor interaction: each movement of the regulator causes a detectable change in the magnetic field. As the magnet (404) moves downward during pressure release, the Hall sensor (403) turns ON; as the magnet (404) moves upward, the sensor (403) turns OFF. These transitions are counted by the processor on the PCB (402) to represent a single whistle.
The display logic and user interaction are further elaborated in Figure 8(E), which illustrates the information shown to the user during operation. Users can toggle between Whistle Mode and Timer Mode, based on their cooking preference. Once the preset whistle count or timer elapses, the processor triggers a signal to the Bluetooth module, which communicates this status to the mobile application, allowing users to be notified even when away from the kitchen.
A plastic mock-up (Figure 5) was created to visualize product design, check component placement, and refine ergonomics before building a functional prototype. The working proof of concept (Figure 6) demonstrates the successful integration of all components, showing that the system can reliably detect whistles and communicate with the mobile app. The electronics were tested under simulated cooking conditions.
To ensure the reliability of the system, Figure 7 presents the assembly sequence, showing the order in which components are assembled from base to final unit. This modular approach simplifies serviceability and future upgrades. Detailed testing was carried out on the prototype, and results are compiled in Figure 8. These include the Air Pressure Test (Fig. 8A) to validate pressure retention, Proof Pressure Test (Fig. 8B) to confirm safety valve activation under overpressure, Gasket Release Test (Fig. 8C) to ensure correct functioning of the safety release system, Sensor Testing (Fig. 8D) to verify the reliability and accuracy of whistle detection, and a Cooking Test (Fig. 8E) to demonstrate real-world usability and performance under typical cooking conditions.
Importantly, the cooker is designed to retain all traditional functions in the event of an electronic failure. This fail-safe mode is shown in Figure 9, where the cooker operates as a standard stove-top model without relying on sensors, displays, or Bluetooth. This guarantees user safety and functionality regardless of battery life or sensor integrity.
Finally, Figure 10 shows the mobile application integration, a key feature of the invention. In Figure 10A, the app is operating in Whistle Mode, where it displays live whistle count and notifies the user once the preset number is reached. In Figure 10B, the app is in Timer Mode, counting down from the user-set duration and alerting upon completion. The mobile app provides a modern and flexible interface that supports remote monitoring and future feature enhancements.
Using the timer mode, the current invention is configured to operate independently of whistle detection, enabling use of the pressure cooker for auxiliary food preparation tasks such as soaking or marinating, as illustrated in timer interface (Fig. 10B).
In summary, this invention merges traditional cooking practices with modern sensing and connectivity technologies, improving accuracy and usability without compromising safety. The handle-integrated smart system offers dual-mode cooking, remote monitoring, and precise whistle detection, all while preserving the cooker’s ability to function independently in manual mode. This makes it suitable for both Indian and Western culinary styles and enhances the overall cooking experience.
,CLAIMS:CLAIMS:
I/We Claim:
1. A pressure cooker lid with whistle detection assembly (Fig. 1) comprising:
a. a pressure regulator (200) configured to maintain and release pressure during cooking;
b. a magnet (404) operatively attached to the pressure regulator to move in response to regulator movement;
c. a Hall-effect sensor (403) positioned to detect the magnetic field changes generated by the magnet movement;
d. a processor mounted on a printed circuit board (402), configured to interpret ON/OFF signals from the Hall-effect sensor to count pressure release events (whistles);
e. a display unit (401) integrated into the cooker for showing whistle counts or a timer countdown;
f. a user interface comprising buttons (201) to set desired whistle counts or timer duration;
g. a Bluetooth module (201) for wireless communication with a mobile application (Fig. 10);
h. a power source for the processor-sensor-display system in the lid, comprising of replaceable AAA batteries (301);
wherein the cooker is operable in both a whistle-counting mode and a timer mode, and wherein the cooker retains complete manually operable pressure-cooking functionality in the event of electronic failure (as shown in Fig. 9).
2. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the magnet (404) is a neodymium magnet fixed to the base of the pressure regulator (405) to allow linear, repeatable displacement aligned with pressure actuation.
3. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the Hall-effect sensor (403) is aligned within the handle assembly (201) such that it reliably detects vertical displacement of the magnet during each whistle event.
4. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the processor on the PCB (402) is programmed to convert each detected ON/OFF signal from the Hall-effect sensor (403) into a corresponding whistle count, which is then displayed on the display unit (401).
5. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the display unit (401) comprises a segmented LCD that shows real-time whistle count or countdown timer, and includes buttons for user input and mode selection (whistle or timer).
6. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the Bluetooth module (201) transmits whistle count or cooking status to a paired mobile application interface (Fig. 10A and Fig. 10B) configured to notify the user upon preset condition completion.
7. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the power source comprises at least two AAA replaceable batteries (301) housed inside the waterproof handle (201), with an average operational life of at least two months under normal usage.
8. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the handle assembly (201, 202) is designed to be hermetically sealed, waterproof, and detachable for cleaning and maintenance without affecting the core electronics.
9. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the cooker retains full mechanical functionality including pressure sealing and release, even when the electronics are non-functional (as shown in Fig. 9).
10. The pressure cooker lid with whistle detection assembly, as claimed in claim 1, wherein the timer mode is configured to operate independently of whistle detection, enabling use for auxiliary food preparation tasks such as soaking or marinating, as illustrated in timer interface (Fig. 10B).